Attachment for force-pumps



2 Sheets-Sheet 1. S. L. FRENCH. Attachment for For-0e Pumps. No. 233,667. Patented Oct. 26.1880.

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2 Sheets-Sheet 2, S,- L. FRENCH. Attachment for Force. Pumps.

No. 233,667. I Patented om. 26 188 0.

UNTTLED STATES PATENT Truce-3.

SAMUEL L. FRENCH, OF LIGONIER, PENNSYLVANIA.

ATTACHMENT FOR FORCE-PUMPS.

SPECIFICATION forming part of Letters Patent No. 233,667, dated October 26, 1880.

Application filed January 9, 1880.

To all whom it may concern:

Beit known that I, SAMUEL L. FRENCH, a citizen of the United States, residing at Ligonier, in the county of Westmoreland and State of Pennsylvania, have invented certain new and useful Improvements in Attachments for Force-Pumps and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others to skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure l of the drawings is a plan view. Fig. 2 is a side view. Fig. 3 is an end view. Fig. 4 is a plan view, showing the improvements in connection with a pump and engine.

This invention relates to certain means for regulating the stroke of the piston-rod of a steam-engine and the piston of a pump.

Heretofore this result has been accomplished by means of slotted levers pivoted at one end to a frame arranged above .the pump and 2 steam-engine, between which is arranged a single lever, also hinged at one end, in combination with a rod provided with slides working in the slots in the levers, and said slides adjusted by a screw having its bearing upon the 0 end of the interposed lever.

My improvement is designed to operate or remove certain objections in the above-named means, among which may be stated the duplt cation of parts and the employment of the in- 3 5 tervening oscillating links attached directly to the pistons of the engine and pump; also, to reduce the wear of the plunger, gland, and valves of the pump.

In the annexed drawings, forming a part of 4.0 this specification, the letter A represents a frame on a locomotive with my improvements mounted thereon.

The letter B indicates a transverse dovetailed. bar attached to the upper surface of the longitudinal bars of the frame A. Arranged on this bar B, capable of moving in the direction of its length, is a fulcrum-block, O. This fulcrum-block is correspondingly dovetailed to snugly fit the dovetailed transverse bar. The forward end, D, or that end extending outwardly of the block 0, is provided with a force-pum p.

vertical fulcrum pin or stud, E, over which passes a slotted lever, F. The forward end of this slotted lever F is pivoted to a block, G, adjustably attached to the plunger-rod of the The other end of the slotted lever is connected by means of jointed arms to the crosshead of the steam-engine.

Suspended from the moving fulcrum-block O by means of a bolt is the block H, as shown in Figs. 1 and 3 of the drawings. The lower portion of this block H is screw-threaded with female threads.

The. letter I indicates a transverse screwthread rod, arranged parallel but below the transverse dovetailed bar B. This screwthread bar I passes through the screw-threaded portion of the block H, which is connected to the moving block 0 by means of the bolt or pivot 12. At the outer end of this screw-bar l is a beveled gear feathered thereon, into which meshes the small beveled gear 0, attached to the lower end of the operating-rod L, provided at its upper end with the handle M. This opcrating-bar L is supported by means of the standards or brackets f f.

The pump-plunger is supported at its outer end by means of the brackets h h extending outwardly from the frame A, as shown in Fig. l of the drawings.

Operation: As the cross-head of the engine moves with its piston it will give a movement to the slotted lever, which, in return, will move the plunger of the force-pump. By adjusting the block 0 inwardly on the transverse bar A through the instrumentality of the operating-rod, gearing, and screw-threaded rod, the block 0 is caused to move inwardly by means of its companion block H moving upon the screw-rod I in the same direction. By this movement of the block 0 with its fulcrum-pin in the slot of the lever the length-stroke of the plunger is changed so that the plunger of the force-pump will have the same length of stroke.

It will be observed that by moving the fulcrum-block O with its engagement with the slotted lever in the direction of the plunger of the force'pump the stroke is shortened, thereby displacing a desired amount of water per stroke to feed the boiler or source of supply, and thus it will be understood that working a pump on a body of Water you have no vacuum to contend with.

The following advantages are also claimed: That this motion hereinbefore described great- 1y reduces the wear of the plunger, gland, valves, 850., of the pump, and also prey'ents the working of compressed air in the pump and pipes when no water is being fed to the ,boiler, thereby greatly reducing the cost of keeping the pump in order.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a device for regulating the stroke of the piston-rod of a steam-engine and the piston' of a pump, the movable fulcrum-block arranged on the dovetailed bar, the screwthreaded block suspended from the fulcrumblock and moving with the same, the slotted lever, the screw-threaded rod, and operating mechanism, substantially as described.

2. In a device or means for regulating the stroke of the piston-rod of a steam-engine and the piston of a pump, the dovetailed recessed fulcrum-block (3, provided with the suspended block H, in combination with the dovetailed transverse bar B and the screw-threaded rod I, substantially as described, and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

' SAMUEL L. FRENCH. Witnesses:

G. S. VANNEAR,

JOHN ANDERSON. 

